Generalized Space Vector Modulation for Grid-Connected Current Source Converter in both Continuous and Discontinuous Current Modes

Three-phase current source converter (CSC) is widely used in many applications. In practice, the CSC may operate in both continuous current mode (CCM) and discontinuous current mode (DCM) under different loadings. In case of DCM, the grid current of CSC would be distorted and the output voltage would lose control. In order to solve the problem, a novel generalized space vector modulation strategy is presented in this paper. Compared with the conventional solution, the proposal reduces the total harmonic distortion of grid current from 27.01% to 3.91% in the DCM. Meanwhile, the output voltage is well regulated to the rating, instead of losing control. The simulation results verify the effectiveness of the proposed solution.

[1]  Ming Cheng,et al.  Harmonics Suppression for Critical Loads Using Electric Springs With Current-Source Inverters , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[2]  Pablo Cossutta,et al.  Single-Stage Fuel Cell to Grid Interface With Multilevel Current-Source Inverters , 2015, IEEE Transactions on Industrial Electronics.

[3]  Xiaoqiang Guo,et al.  A Novel CH5 Inverter for Single-Phase Transformerless Photovoltaic System Applications , 2017, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  Hao Chen,et al.  Soft-Switching Solid-State Transformer (S4T) , 2018, IEEE Transactions on Power Electronics.

[5]  Xiaoqiang Guo,et al.  Three-Phase CH7 Inverter With a New Space Vector Modulation to Reduce Leakage Current for Transformerless Photovoltaic Systems , 2017, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[6]  Yong Yang,et al.  Optimal Space Vector Modulation of Current-Source Converter for DC-Link Current Ripple Reduction , 2019, IEEE Transactions on Industrial Electronics.

[7]  Anshuman Shukla,et al.  Norton Equivalent Modeling of Current Source MMC and Its Use for Dynamic Studies of Back-to-Back Converter System , 2017, IEEE Transactions on Power Delivery.

[8]  Thomas M. Jahns,et al.  Uncontrolled Generator Operation of PM Synchronous Machine Drive With Current-Source Inverter Using Normally on Switches , 2017 .

[9]  Josep M. Guerrero,et al.  Space Vector Modulation for DC-Link Current Ripple Reduction in Back-to-Back Current-Source Converters for Microgrid Applications , 2015, IEEE Transactions on Industrial Electronics.

[10]  Jose A. Cobos,et al.  Design of Energy Control Method for Three-Phase Buck-Type Rectifier With Very Demanding Load Steps to Achieve Smooth Input Currents , 2016, IEEE Transactions on Power Electronics.

[11]  Bin Wu,et al.  A Medium-Frequency Transformer-Based Wind Energy Conversion System Used for Current-Source Converter-Based Offshore Wind Farm , 2017, IEEE Transactions on Power Electronics.